Faceting Design Diagram: Topaz Crystal III – Topaz – Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Purple, Champange

Topaz (Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Champange)

Topaz Crystal III (TOPAZ6.JRG)
By Jeff R. Graham
Copyright 1993
70% Light Return
Angles for R.I. = 1.62
87 facets + 16 facets on girdle = 103
2-fold, mirror-image symmetry
96 index
L/W = 1.428 T/W = 0.876 T/L = 0.613
P/W = 0.477 C/W = 0.213
H/W = (P+C)/W+0.02 = 0.710
P/H = 0.672 C/H = 0.300
Vol./W^3 = 0.369

Addition # 2 – This design makes a good large oval in any material, but it is not easy to cut. But if you like ovals, it has nice flash and light return. The cutting will keep you out of trouble for quite a while, 4-18cts.

Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.